ATE16050T1 - SENSOR WITH MAGNETIC DUAL-CORE AMPLIFIER. - Google Patents

SENSOR WITH MAGNETIC DUAL-CORE AMPLIFIER.

Info

Publication number
ATE16050T1
ATE16050T1 AT81901401T AT81901401T ATE16050T1 AT E16050 T1 ATE16050 T1 AT E16050T1 AT 81901401 T AT81901401 T AT 81901401T AT 81901401 T AT81901401 T AT 81901401T AT E16050 T1 ATE16050 T1 AT E16050T1
Authority
AT
Austria
Prior art keywords
current
magnitude
primary
cores
polarity
Prior art date
Application number
AT81901401T
Other languages
German (de)
Inventor
Kenneth Lipman
Original Assignee
United Technologies Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United Technologies Corp filed Critical United Technologies Corp
Application granted granted Critical
Publication of ATE16050T1 publication Critical patent/ATE16050T1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
    • G01R19/20—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers using transductors, i.e. a magnetic core transducer the saturation of which is cyclically reversed by an AC source on the secondary side

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Amplifiers (AREA)
  • Measuring Magnetic Variables (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measuring Fluid Pressure (AREA)
  • Level Indicators Using A Float (AREA)

Abstract

A magnetic amplifier sensor for measuring the magnitude and polarity of a DC current flowing in a line (10) includes a pair of saturable cores (32, 34) each having a primary (28, 30) and secondary (36, 38) winding mounted thereon. The primary coils (28, 30) are connected in series and a portion of the DC current component to be measured is diverted to a shunt circuit (16) which includes the primary windings. The secondary coils (36, 38) are connected to a push/pull type of AC source (40, 42) so that the flux levels in the cores operate in a drive/reset mode. A DC current in the primary winding (28, 30) causes a variation in the absolute magnitude of the flux levels of the two cores (32, 34) as a function of the time constant of the circuit so that during the drive interval one core saturates before the other. After rectifying, a differential signal is formed which when integrated provides an output signal whose magnitude is indicative of the magnitude DC component of current in the shunt circuit (16) and where polarity is indicative of the polarity of the DC component of current in the shunt circuit (16). A second embodiment of a magnetic amplifier sensor includes an additional winding (137, 139) on each of the saturable cores (132. 134). A portion of the output signal is fed back to the two additional windings (137, 139), which are connected in series, to provide the negative feedback for improving overall input-to-output linearity, and also for enhancing the response time of the amplifier sensor.
AT81901401T 1980-12-19 1980-12-19 SENSOR WITH MAGNETIC DUAL-CORE AMPLIFIER. ATE16050T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP81901401A EP0067153B1 (en) 1980-12-19 1980-12-19 Dual core magnetic amplifier sensor
PCT/US1980/001714 WO1982002253A1 (en) 1980-12-19 1980-12-19 Dual core magnetic amplifier sensor

Publications (1)

Publication Number Publication Date
ATE16050T1 true ATE16050T1 (en) 1985-10-15

Family

ID=22154696

Family Applications (1)

Application Number Title Priority Date Filing Date
AT81901401T ATE16050T1 (en) 1980-12-19 1980-12-19 SENSOR WITH MAGNETIC DUAL-CORE AMPLIFIER.

Country Status (5)

Country Link
EP (1) EP0067153B1 (en)
JP (1) JPH037071B2 (en)
AT (1) ATE16050T1 (en)
DE (2) DE67153T1 (en)
WO (1) WO1982002253A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8309559D0 (en) * 1983-04-08 1983-05-11 Ass Elect Ind Dc current transformer circuits
CN114994389B (en) * 2022-05-25 2023-09-26 北京中联太信科技有限公司 Magnetic superconducting micro-direct current detection device and method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2657281A (en) * 1950-02-15 1953-10-27 Ward Leonard Electric Co Electromagnetic audio amplifier
US2892155A (en) * 1954-08-09 1959-06-23 Westinghouse Electric Corp Apparatus responsive to direct quantities
DE1265858B (en) * 1963-09-27 1968-04-11 Licentia Gmbh Directional DC voltage isolating converter
US3135911A (en) * 1963-11-15 1964-06-02 Magnetics Inc Polarity sensitive saturable core reactor
US3351851A (en) * 1964-06-26 1967-11-07 Foxboro Co Balanced magnetic amplification and process control apparatus
DE1763343C3 (en) * 1968-05-09 1974-02-14 Calor-Emag Elektrizitaets-Ag, 4030 Ratingen DC converter
US3855528A (en) * 1973-04-06 1974-12-17 Lorain Prod Corp D-c current measuring circuit

Also Published As

Publication number Publication date
EP0067153A1 (en) 1982-12-22
JPH037071B2 (en) 1991-01-31
WO1982002253A1 (en) 1982-07-08
JPS57501975A (en) 1982-11-04
EP0067153B1 (en) 1985-10-09
DE67153T1 (en) 1983-04-14
EP0067153A4 (en) 1983-04-25
DE3071179D1 (en) 1985-11-14

Similar Documents

Publication Publication Date Title
US4276510A (en) Apparatus for sensing current transformer primary current as a function of differential core inductance
US4278940A (en) Means for automatically compensating DC magnetization in a transformer
DK271890D0 (en) POWER SUPPLY CIRCUIT WITH INTEGRATED MAGNETIC COMPONENTS
DK577588A (en) CIRCUIT FOR THE DETECTION OF ASYMMETRY IN THE MAGNETIZING CURRENT IN A MAGNETIC MODULATOR
US3855528A (en) D-c current measuring circuit
US3649908A (en) Magnetic field gradiometer utilizing a pair of cores driven by a blocking oscillator
JPS57199968A (en) Method and device for measuring magnetic field
US3801907A (en) Direct current measurement
ATE16050T1 (en) SENSOR WITH MAGNETIC DUAL-CORE AMPLIFIER.
GB1488262A (en) Measuring direct current
US3430142A (en) Direct current measurement apparatus
GB1003872A (en) A magnetic field detecting device
US3403329A (en) Flux-gate magnetometer with magnetic amplifier
JPS56147086A (en) Flux gate type magnetic sensor
GB897513A (en) Improvements in or relating to tachometer generators and frequency sensitive a.c. systems
GB934901A (en) Blocking oscillator comparator
JPS5745912A (en) Differential transformer
JPS5797368A (en) Irregular magnetism preventing device for transformer
SU379027A1 (en) TRANSISTOR INVERTER
JPS6212862B2 (en)
SU1597755A1 (en) D.c.transformer
SU452918A1 (en) Pulse duty ratio detector
SU458882A1 (en) Magnetic analog storage device
SU1476393A1 (en) Electric power inductive meter rotating element
DE3783869D1 (en) FLOW-COMPENSATED CURRENT TRANSFORMER.

Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee